Guide

Guides are visual cues such as lines or boxes in a bedit control. Guide
configuration informs the recognizer of the types and locations of guides displayed
for the user. With this information, the recognizer can confidently determine
which pen strokes constitute a single character or shape. For an illustration of
box guides, see the "The bedit Control" section in Chapter 3, "The Writing
Process."

To establish guide configuration, an application calls the SetGuideHRC function, providing a pointer to a GUIDE structure: